Winding apparatus



J. ASMUSSEN ET AL WINDING APPARATUS 5 Sheets-Sheet 1 Sept. 2, 1952 Filed Nov. 12, 1947 1% we ra a-rs Sept. 2, 1952 J. ASMUSSEN ET AL WINDING APPARATUS 5 Sheets-Sheet 2 Filed NOV. 12, 1947 -P 1952 J. ASMUSSEN ET AL 2,609,157

wmnms APPARATUS Filed NOV.- 12, 1947 5 Sheets-Sheet 3 wil l eirm/21% irzwar Sept. 2, 1952 J. ASMUSSEN ET AL 2,609,157

wmnmc APPARATUS Filed Nov. 12, 1947 5' Sheets-Sheet 4 Jul/621% I Frank 62 er Sept. 2, 1952 J. ASMUSSEN ET AL 2,509,157

WINDING APPARATUS Filed Nov, 12, 1947 5 Sheets-Sheet 5 25 ZZUnZO? ds fidmmsts'ezz/ Fran/1: 677 7067 Patented Sept. 2, 1952 UNITED STATES PATENT orricaj WINDING APPARATUS Jes Asmussen, Appleton, and Frank Gruper,

Menasha, Wis., assignors to Marathon Corporation, Rothschild, Wis, a corporation of'Wisconsin Application November 12, 1947, Serial No. 785,424. I

3 Claims. (Cl. 242 -66) The invention relates to apparatus for winding a continuous web of sheet material into a roll.

It is the customary practice to wind sheet ma- 7 terials, such as a paper web, onto a winder shaft or core by means of a pair of driven rotating drums in frictional engagement with the web being wound onto the winder shaft at the nip of the drums and the wound roll. It is evident that as the amount of paper wound on the winder shaft increases, the diameter of the wound roll increases, resulting in an increased weight or pressure upon the supporting driven rotating drums, with the consequent increase in pressure upon the web being wound. The effect of the increased pressure upon the web is to increase the tension on the web with frequent rupture occurring. Another undesirable result is that the Web is wrinkled as it is being wound. Furthermore,

the density of the wound roll progressively increases from the winder shaft outwardly towards the periphery,

In order to overcome these difiiculties the present invention provides automatic means for controlling the pressure and tension upon the web 7 by compensating for the normal increase in pressure and tension upon the Web as it is being wound onto the winder shaft. In this manner a suitable amount of constant tension may be applied to the web at all times.

The problems previously outlined are further complicated when it is desired to use the same winding apparatus to wind webs of diiferent widths or density. For example, if after winding a web of agiven width or density into a roll it is desired to use the same winder for a web of dinerent width or density there will be a corresponding change in weight and likewise pressure of the Wound roll upon the drum winders for the same linear length of the web. The present invention permits a simple adjustment for webs of different width or density so that the pressure and tension upon the web is always, constant and of the same desired amount. I

The primary object of the invention is to provide automatic means for controlling the pressure and tension upon a web as it is being wound and to compensate for the increase in weight of a roll of web material as it is being Wound with a drum winder.

Another object of the invention is to provide 1, jother obje'cts andjadvantages will more fully 2 appear from the description and wherein: .1 Figures 1, and l-A represent a front view drum winder in combination with'meansfor ontrolling the pressure of a rollbeingwound pen the rotating supportingdrumm '1 Figure 2 is a side View of the machine taken along the line 2-2 of Figure 1; v V

Figure 3 is an elevational view of thecompensating cam taken along the line 3-3 of Fig urel; '3

Figures 4 and l-Arepresent a diagrammatic view of the relationshipoi a hydraulic system with a compensating cam whereby compensating pressure is supplied by the vhydraulicsystem for the changes in weight of the roll as it. is being wound; Figure 5 is a vertical, sectional view ofthe compensating cam taken along, the line 5 Q5 of Figure3;and i Figure 6 is a perspective view of the co pensating cam. Referring to the drawings, the apparatus comprises the usual double drum winder mechanism lrawie which includes a frame Hi, two rotating drums ii and I2, having their respective shafts I'. and

i2 journaled in the framelii. The'drum Jill and I2 are driven in the same directionand'lat differential speeds. A core assemblyjls having a winder shaft 13 is provided ,at thefni of'ithe drums i i and I2 for frictionally windingai web i6 thereon. The winder shaft 5; is journaledjin a pair of spaced split bearings it, which areeach secured to a plate. E8. The plates it are mounted for vertical movement in a painof, spaciedfgriideways it. The upper and lowertportiohsio each split bearing are .pivotally connected by pin v5. To loci: the split bearings l4 about the Winder shaft 53', or to permit opening the bearingsfl l to allow removal of the winder shaft, ahandoperable cam 5 is rotatably mounted on each plate i8 for cooperation with the upper portion of each split bearing. The web, it, .such as paper, is suitably threaded betweenthe drums H and I2 and attached to the core assembly I3 preparatory to being wound into a roll ll". 1 As .the webglfi is wound onto the core assembly I3, the rol I'll-increases in diameter andweight whereuponthe bearings 14 and their attached plates ldlwillfslide vertically upwards in the guideways 15. '1

A pair of cables [9 is provided withone end h of each cable [9 is fixedlysecured to ,asheave 20 asby soldering. A pair off-sheaves. llarekeyed for rotation with a shaft 2| between spaced bearings 90 and 9| mounted on the upper portion of the frame l and in which the shaft 2| is journaled. Each sheave is provided with a medially disposed flange 20 thereby forming a pair ofispacedggroovestfl ands-3. AQ-second pair of cables .1 .is-provide'd with one "end of each cable secured by a connector clamp H to a piston rod 22, and its piston 94, of a pair of spaced hydraulic cylinders 23. The other end of each cable I is likewise securely fastened to the sheave 20 as by soldering. As shownin Figures .1 .and l-A, each cable I is disposed.to 'bewound-inthe groove 92 of each sheave .ZMandeachcable IQ is arranged to be wound in the other groove 93, the two cables being separatedbythecmedial flange 20'. Each cable I may havea'rea-chthereof-suitably supported by a roller 24 supported:in a bracket 24' mounted onzthe frame I0.

.A. cam .25 -is provided .for compensating for the increases in pressure of the roll I! ,upon.the .dmms .l l and Has. his .being wound .upon the core .assembly 13. The .cam -25 is .also cut or .forme'dtocompenseitefor or reflectincreases in weight when webs of different widthor density .-arerw.ound. .Theicontourof the cam'25 isiillusv 25 may be mounted directly uponthe 'shaft'2l.

.The sleeve 81'is preferredyhowever, because of the greater ease-and simplicity of machining'and handling the smaller sleeve element.

Cooperating with the cam 25 is a cam-follower .26 such as a steel ball mounted on the end of ;a?bari21. 'Thezother end of 'the'bar 21 .is screw j'threaded'in a'bracket 28 so that the effective .length ofthe bar 21 maybe varied or adjusted by rotatinga bar grip .21. 'The'bracketzfiis plvotallyconnected'to -one end 'ofa lever arm 29 by a;pin30. "I'helever arm 29'is "fulcrumed tin- "ward ofits 'other end29' "by a.pin"-3 tin abracket $.32 suspended from'a support 33. The support 33 .is fastened'to the ?top 'o'f.a"horizonta1ly disposed plate! which "is -fastened to'frame "cross bar [0 by-membersfl. The end-29 of'th'e lever -arm-29 contacts andbears against apin'34'of an-adjust- :ablerrelief valve 3 5.

' fllterrflrandia.bafile plate 84. "The balanced piston valve .38 is also connected to a pump 31 by .a line I02, ,thepump acting upon ithereservoir T36 through aline 1113. "The balancedpiston'valve 1381s also connected to a "three-way valve "40, fhaving a lever handle '41, by a pipe "line [01. Hydraulic piping H0 and I'll connect the ends of the cylinders '23. The three-way'valve 40 is 4 connected to the upper end of cylinders 23 by pipe lines I08 and III to enable the fluid to act upon the upper face of each piston 94. The valve 40 is also connected to the other end of each cylinder 23 by pipe lines I99 and H0 to enable thefluidto-act upon theJower face ofteach piston 94. A hand shut-ioffvalve Aris located in the line I08. The valve 35 is directly connected .to the reservoir 36 by means of pipe line 100.

The valves 39 and 40 are connected to the line lllfl by pipe lines l0! and H2, respectively. The

operation .of the hydraulic system will be subsequently r described.

reflect the amount of pin travel twelve (.12)

times. .For example, with the core .shaft .assembly l3 weighingjLOOO pounds, and .the'pressure in the hydraulicsystem, through-the cables land l9, supporting this weight withthe desired pressure .upon the drums Ill and 12, .the pin .34 .of valve 351s set.at.zer.o. Whenrthe web l6 has been wound .on .the core assembly l3 .to give a fully woundrollfl, thepirrhas travelleditsmaximum distance of one-quarter 4) .inch. .The combined .Weightof .core assembly-and web ma- -terial wound .thereon. is determined.- and let.it-be assumedsuch combined weight is 4, .-p Eor .-an-intermediate;.point, say wherethe combined .weight of ..the core shaft assembly I13 .and the web wound thereon is eguaLto 2,50.0.pounds, ,the pin willtravel one-eighth /8)..inch. These amounts compounded twelve (12) .times are for ,a suitablenumber. of combined weightsinter- .mediate the weight .of the .core assembly .alone and .themaximum weight v.of the coreassembly fully wound with .a web of material .ofagiven width. In this manner-thecontour of the cam is ,determinedfor a web .of given width. =For webs of difierent width, .the maximumcombined vand intermediate weights will, of \course, .be .different. Eollowingthesame determinative pro- .cedureoutlined above, the .contour ofthecam may be determined .for any given .web width. .The contour of the..camuthus-determined isv illustratedin FiguresB, 5.and '6. .ReferringtoEigures 1 .and l-A, with the cam -2.5.fixedagaimt horizontal movement, rotation thereof (under: the cam follower 1Z6Jis translated .to the pin34 .to react .upontheroil in the hydraulic systeminamanner to be subsequently described. .To compensate for increases in weight for .a web .of different width, .the cam .25 ,is moved.horizontally .to -another selected position and (fixed against .horizontal .movement thereby presenting .another (segment .of the rotatable .camto its .cam followerf26.

'Mechanism is provided to slide .thecami Solon- .gitudinally along the sleeve .8]! -to ,present a selected area of the cam to thecam follower 2V6. 'Thecamis provided with end plates S and 86 suitably secured thereto by screws 18! and 88 threaded within the threaded openings.8'l' and 238?, respectively. A collar 4'4, which encircles the sleeve8l, is secured'to'the end'plate'85 and handwhee'l or lever 49 through the arrangement of a sprocket 56 secured to anendof the threaded rod 48, asprocket 50' secured to an end of a hand lever shaft 49f, journaled on the'frame I "and a'chain I The rotation of the threaded'r'od 48,

'thr'ough the threaded-bar 46, win cause the cam through the yoke 45 and the attached collar 44.

To indicate the desired position of the cam v on theshaft 21, one end of a cable"52 is-secured to' 'the yoke45 by clamping elements52. "The other end; of the cable 52 is fastened to a weighted member; slidablein' gui'deways 53 having its surface marked to form ascale which in combination with a datum line or pointer 54 willindicate the horizontal position of the cam 25 on the sleeve 8|. The lower "portionof'cable 52 is made to assume a vertical position by the suitable positioning of a roller I5; Thescale is calibrated 'to indicate different widths of web. The portion 'ofthe cam 25 presented to the cam follower 26 has'a direct relationship t'o the width of web I5 -for whichcompensation must be made as it-is "being wound in order to maintain the tension upon the w'eb, o rthe pressurebetween the drums 1 I I* andfl2 and the roll being woundjat a desired constant amount. w

The apparatusj 'described operates as follows. Thepos'ition-oithe cam 25 is set for a given web width-as indicated on the scale 53 by turning the hand wheel or lever 49. The hydraulic system is adjusted so that thedownward pressure upon the'pistons-94 is suihcient to bear a portion of the weight of the core assembly I3; the weight of the cables le and -'I which are .taut,..to overcome the friction ofmoving parts and to allow a portionbrthe weight of the-core assembly I3 to bear upon'the drums-II and I 2 to apply'thedesired-pressure and tension upon the web I6 which will be wound up into the-rollI 'I.'-'

' As the web I6 is wound andthe roll 'II grows in size, the winder shait |3' supported in the slidable, bearings I4 rises and causes the cables .I8 and I to rotate the sheaves 20. The'sheaves '20 beingfixed to the shaft 2I will turn the shaft 2|, the sleeve 8| fixed thereto and the compensating cam 25 keyed to the sleeve. As the cam 25 is rotated, the cam follower 26 rises. The motion of the cam follower 26 is translated to the hydraulic system by the action of the lever end 29' upon the pin 34 of the calibrated adjustable relief valve 35. This results in a corresponding increase in pressure being translated downwardly upon the pistons 94 to compensate for the increases in pressure of the roll I! upon the drums II and I2. The effect is to maintain the pressure and tension constant on the web I6 between the roll I I and the rotating drums II and I2.

Referring to the hydraulic system diagrammatically illustrated in Figures 4 and 4-A, the handle 39' of the selector valve 39 is initially placed in position B and the handle M of the three-way valve 40 is initially placed in position D which is the position for automatic control. As the drums I I and I2 are rotated and the web I6 is being wound on the core assembly I3, the pin 34 is gradually depressed by the mechanism heretofore described; The gradual downward'movement of the pin 34 causes a commensurate increase in pressurein the line I04 and the line I05 through the selector valve 39. The effect upon the balanced piston valve 38 is to cause the pressure to be likewise increased in the lines'Ill'I', I08 and II I thereby causing the pistons 94 to be moved downwardly an amount proportionalto the pressure transmitted to the oil in the system by the movement of the pin 34. With the handle 4| of the three-way valve 40 in positiOn'D for automatic control, the lines I01 and I08 are directly connected. Thus, the pressure exerted upon the pistons 94 is at all timesfdirectly re"- sponsive' to the movement of thepin 34. The movement ofthe pin 34 is directly'respon'sive to the rotation of the cam 25 which in-turn'is directly responsive to the movement of the cables I and I9 which turn the shaft 2I as the web" is beingwound. Hence as the weight of the rolll'l increases,.the"roll I1 is commensurately lifted by the cables 'I and I9 to thereby maintain thedesired and initially set"pressure between the core assembly I3 and the rotating drums II and pressure to be appliedv downwardlyupon the pistons 94. Thus, by gradually turning the lever handle 39 from positionB to position C, the fully wound roll ll having the radius'R uponthecore assembly I3 may be manually lifted from the guides I5. -To lower the assembly to a suitable storage space, the hand lever M of the three-way valve 40 is gradually moved towardpositionF thereby causing the pressure exerted by the pump 3'! to be directed throughvalve 40 and the lines I09 and-I ID to cause the pressure to be exerted on the bottom faces of the pistons 94. This results in the pistons 94 being'moved upwardly and-the gradual lowering of the assembly- 'heldby the cables .I and I9;:the cables unwindingfro'm the sheaves 2U. After'the assembly of coreandwourid web material is deposited where desired, the split bearings I4 are opened by turning the cam 6. The

apparatus is then readied for another winding operation.

To wind a web of a 'diiierent width, the cam 25 is moved along the shaft ZI to the desired position as indicated on the scale 53. In this manner another segment of the cam is presented to the cam follower 26 which will give a corresponding compensating pressure to the pistons 94 in the hydraulic system for .a roll of the width being wound.

To assure that the component of contact pressure between the roll I! and the drums l I and I2 remains constant for webs of different width, notwithstanding that the core assembly I3 is the same, the cam 25 is cut or formed to compensate or reflect such component of contact pressure when the cam follower '26 is in contact with its surface; Thus the pressure upon the web is at all times constant regardless of the linear width of contact between the roll being wound and the drums II and I2.

- 1 The efiective length of the bar 21 ofthe linkage described is adjustable and permits charging the cylinders 23- to any desired degree. In this man ner' the initial pressure-between the drums H and I2 and the roll I! may be suitably adjusted.

While the apparatus has beenispecifically described as capable of accommodating-webs of different width, it is obvious that the same appara- 31133- suitable for compensating for weight increases for webs of different density. It is simply necessary to'also calibrate the scale on member 53 in terms of density as well as width. While the, specific embodiment described includes .two'drivendrums to frictionally engage the web beingwound onto the core assembly or winder shaft it is understood that the invention, may be practicedwith a single drum. Furthermore, the described apparatus may be used to wind; any continuous flexible web ,or aligned strand material, such as pa-per,.textiles, regenerated cellulose, metal foil, synthetic rubber or synthetic resin films, coated sheets,laminates,

etc.

i The present invention may be embodied in other specific forms without departing from the. essential attributes thereof. It is desired that the present specific embodiment be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the aforegoing description to'indicate the scope of the invention. We. claim: 1. A winding machine comprising a pair of driven drums, a winder shaft upon which a web is wound located at the nipof saiddrums, said web being wound into a roll by frictional engagement with said-drums, spaced guideways, said winder shaft being journaledfo-r movement in said guideways, a hydraulic system including a pair 'of cylinders each having a piston, connecting means between said winder shaft and said pistons, a cam shaft, .a cam mounted on said cam shaft for rotation therewith, said connecting means rotating said cam shaft as the web is being wound, a cam follower engaging said cam, said cam follower being connected to a valve in said hydraulic system whereby movement of the woundrollaway from said drums causes the hydraulic system to supply compensating pressure upon said pistons.-.

-2..=A winding machine comprising a pair of driven drums, a winder shaft upon which a web is wound located at the nip of said drums, said zwelobeing wound into a roll by frictional engagement with said drums, spaced guidewayaslidable, split bearings mounted in said guideways journaling said winder shaft for movement in saidguideways, a hydraulic system'incl-uding a pair of cylinders each having a piston, cables connecting the-ends of said winder shaft and said pistons, a cam shaft, a cam mounted on said camshaft for rotation therewith, said cables rotating said cam shaft as the web is being wound, a cam follower engaging said cam, said cam follower being connected to a valve in said hydraulic system whereby movement of the wound roll away fromsaidxdrums causes the'hydraulic system to supply compensating pressure uponsaid 3.'A winding machine comprising, a pair of driven drums, a winder shaft upon which a web is wound locatedat the'nipof said drums, said web being; wound into a roll by frictional'engagement with said: drums, spaced guideways, slidable, split bearings =m'ounted in said guideways journaling said winder shaft for movement in said guideways, a hydraulic system including a pair of cylinders each, having a piston, a cam shaft. spaced sheaves mounted on said cam shaft for rotation therewith, a cam mounted on said cam shaft for rotation therewith, cables connecting the ends of said winder shaft and aid pistons to said sheaves, said cables causing said sheaves to rotate as the web is being wound, a cam follower engagingsaid cam, said cam follower being connected to a valve in said hydraulic system whereby movement of. the wound roll away from said drums cause the hydraulic system to supply compensating pressure upon said pistons.

- JES ASMUSSEN.

FRANK GRUPER.

REFERENCES CITED The following references areof record in the file of this patent: Y

v UNITED STATES PATENTS 438,640. Great Britain. "Nov. 20, 1935 

